I've been an Ubuntu user for years, and I just got my first Mac. One thing I haven't yet figured out is how to decrypt my encrypted filesystem on which I store my SSH and GPG keys on my flash drive. I used this guide in the past to set it up, and have just been running the shell script to decrypt and mount it since then.

However, I cannot figure out how to decrypt it on OS X. Running brew install cryptsetup doesn't work.